January 19

• Postal payments for month ended 5 January should reach your HMRC Accounts Office by this date. If you pay late you may have to pay a late payment penalty.
• Receipt of the Contractors Monthly Returns for month ended 5 January for those under the Construction Industry Scheme is due by this date whether submitted electronically or on paper.

January 22

• Electronic payments for month ended 5 January must clear into the HMRC bank account by this date. If you pay late you may have to pay a late payment penalty.

January 31

• Deadline for electronic submission of Self Assessment tax returns for tax year ended 5 April 2015
• Balancing payment of 2015 Tax Return due together with the 1st Payment on Account for the 2016 tax liability
• Companies House filing date for companies with a year end of 30 April 2015.